Voltage-driven hysteretic changes in magnetization in multiferroic Co/BTO composite thin films

Li Shu, Jia Mian Hu, Yao Gao, Liang Wu, Jing Ma, Y. H. Lin, C. W. Nan

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

Multiferroic Co/BaTiO 3 layered composite thin films were grown on Nb-doped SrTiO 3 single crystal by pulse laser deposition, in which the polycrystalline Co film was annealed under magnetic field to induce in-plane uniaxial magnetic easy axis. Voltage-induced magnetization changes along and perpendicular to the easy axis were measured by Magneto-Optical Kerr effect (MOKE) magnetometer without applied magnetic field. These changes in magnetization could be due to magnetoelectric coupling between Co and BaTiO 3 , and to possibly electro-optical effect of BTO if the MOKE laser could penetrate the top Co film. After excluding the electro-optical interference by analyzing the experimental results within an optical model, a hysteric loop of magnetization versus voltage is identified with a relative change in magnetization of about 8%.

Original languageEnglish (US)
Pages (from-to)599-602
Number of pages4
JournalApplied Surface Science
Volume314
DOIs
Publication statusPublished - Sep 30 2014

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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